Hi Chaz, Yes I've done Minsmere several times as it's only 35 min from where I live and I've been to Dunwich as well, but haven't ever had any luck there. But this place was Westleton nature reserve which I didn't even know existed, is this where you went? found a link to it on the internet
Natural England - Westleton Heath NNR
Weather permitting I'll be popping back next week and spending a bit more time there.